Drying apparatus



June 23, 1931. A. E. JoNssoN DRYING APPARATUS Filed Feb. 14, 1929 2 Sheets-Sheet l June 23, 1931. A. E. `JoNssoN 1,811,355

DRYING APPARATUS Filed Feb. 14, 1929 2 Sheets-Sheet 2 INVNTOR:

ATTORNEYS.

Patented June 23, 17931v A UNITED saires earner orifice AUGUSTINUS EDVARD JONSSON, F LIDNGO, SWEDEN DRYING- APPARATUS Application filed. February 14, 1929, Serial No. 339,999, and in Sweden February 14, 1928.

This invention relates to drying apparatus the supporting column being shown in secof the kind comprising a rota-ting or oscillattion; and ing cylinder containing hollow heating bodies et is a fragmentary sectional view or units heated by means of steam, hot water, aken approximately on the line IV-IV of or any other suitable heating fluid, and which Fig. 3. 6.3 are adapted to support and distribute the Referring to the drawings, l designates the goods to be dried. drying cylinder, which is supported by rollers The invention is essentially characterized 2 and is adapted to be given a rotating or an by the feature that the hollow heating bodies oscillating movement by means A of a motor or units consist of fixed plane shelves extenddriven gearing 3. The hollow heating bodies 60 ing through the whole length of the cylinder or units d are supplied with steam, hot water and grouped in parallel on opposite sides of or any other suitable heating Huid, and are a space extending in a diametrical plane per arranged on opposite sides of a plane diametpendicular to the plane of the shelves and rically across the cylinder through the aXis l5 communicating with the feeding and disthereof and preferably perpendicularly to 55 charge opening in the wall of the cylinder. said plane. The side and end Walls of the This arrangement of the heaters serves the cylinder may be of double wall construction purpose of producing a stirring or mixing thereby to provide a heating jacket 5 comof the goods being dried in such a manner municating with the heating units by means that during the rotating movement of the of pipes. rEhe heating units 4 and the inte- 70 cylinder, which is necessary for the stirring rior wall of the cylinder are provided with operation, the goods will slide from one heatribs 6. rEhe heating Huid is conveyed to the er to another, so that any violent tumbling heating units by means of the pipe and, motion such as would be detrimental to deliafter passing through the several. units of cate or brittle material is avoided. the drying cylinder, is carried off by the 75 The heaters, which are hollow and are suppipe 8. Feeding and discharging openings 9 plied with a. suitable heating fluid, for inare provided for the material being dried. stance hot Water, steam or the like, may be In order to facilitate a rapid and efiicient connected in any suitable manner, for indrying operation, the interior of the cylinder stance in a single series, or partly in series may be subjected to a vacuum, and to this 80 and partly in parallel. end a pipe ll is shown in the drawing, which In order to increase the capacity of the pipe may be connected with a vacuum pump, y drying apparatus, the cylindrical part, and not shown, through the condenser 10 and the in some cases also t-he ends of the cylinder, pipe l2. The heating units 4 are supported may be double walled thereby to provide heatat one end on Hanges 16 carried by supports 85 ing jackets which essentially increase the or columns l5 disposed within the cylinder heating surface. The jackets may directly and at the opposite end are secured in notches communicate by means of pipes with the heatformed in the ribs 6 on the inner wall of the ers, in order to allow the heating fluid to pass cylindrical heating casing. freely during the drying operation. The connection of the inlet and outlet pipes 90 The invention will be more particularly to the heaters 4 and jackets 5 may be effected set forth in the following description in con in any convenient manner. The units are in nection with the embodiment illustrated in terconnected in series by means of pipes eX- the accompanying drawings1 in which tending across the diametrical space between Fig. 1 is a side elevation of the drying apthe two groups of units as shown 1n F 1g. 2. 9v paratus as a Whole; It 1s believed that the operation of the ap- Fig. 2 is a cross-section thereof, taken paratus will be obvious from the foregoing. approximately on the line II-II of Fig. l; After the material to be dried has been Fig. 3 is a fragmentary plan view of one charged into the cylinder, steam, hot water of the heating bodies on an enlarged scale, or other fluid is supplied to the heating units JU cylinder.

and the motor started thereby toV rotate the vThis rotation will necessarily cause the material to move about Within the cylinder, but because of the Wide shelves formed by the heating units the material Will be protected against any violentfalls or jars. Having thus described my invention What l claim is Vl.v A drying apparatus, comprising a rotatable cylinder, hollow heating units disposed Within saidV cylinder for thereception of a heating fluid, said units forming flat shelves extending through the Whole length of the cylinder and grouped in parallel at opposite sides of a free space extending diametricallythrough the axis of the cylinder perpendicular to the plane of the shelves, each of said shelves extending from the circumference of the cylinder to the said diametrical free space,^said space communicating With feeding and discharging openings in the Wall of the cylinder.

2. A drying apparatus, comprising a rotatable cylinder, a plurality of supportingcolunins fixed in said cylinder and extending diametrically thereof, a plurality of 'hollovs7 heating units each supported at one end on said column and t its opposite end on the Wall of the cylinder, said units forming shelves extending through the Whole length of thek cylinder and grouped in parallelzat opposite Sides of aplane extending diametrical- Y 1y throughthe axis of the cylinder perpendic- Y nlar to the plane of the shelves and communieatingv with feeding and discharging openings in the Wall of the cylinder. AUGUSTINUS EDVARD JONSSON. 

